TrueEloPlay what wins.
Analyzer

Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation

1.1K games from Lichess · Updated January 2026

Tough Sell
White Expected Score49.3%Range (90% confident): 46.9% – 51.7%Based on 1.1K games
0%49.3%100%
Range (90% confident): 46.9% – 51.7%
Outcome Distribution
47.6%3.3%49.1%
Win
Draw
Loss
7...Be4
Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation
Analyzen=1.1K
Avg Length29 moves
Sharpness97%
Draw Rate3.3%

What is the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation expected score for White?

Snapshot

At all ratings, the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation has a 49.3% expected score for White (we're 90% confident it's between 46.9% and 51.7%), based on 1.1K Lichess games.

Extra Analysis

Deep-dive datasets for this opening

Gambit BreakpointWhite

Peak: -9.1% · Breakpoint: 1200-1399

Traps & Chaos

Complexity: 93.2 · Trap factor: -6.2 · n=1.1K

White Win% by Rating

Stable across ratings (~39%)

0
1000
1200
1400
1600
1800
2000
2200
2500+

  • 0-999: 38.5% win rate (5 games)
  • 1000-1199: 73.0% win rate (17 games)
  • 1200-1399: 52.9% win rate (58 games)
  • 1400-1599: 46.0% win rate (106 games)
  • 1600-1799: 48.0% win rate (183 games)
  • 1800-1999: 45.9% win rate (248 games)
  • 2000-2199: 46.6% win rate (242 games)
  • 2200-2499: 48.4% win rate (231 games)
  • 2500+: 40.2% win rate (42 games)

White Win% by Time Control

Best in Rapid (51%), worst in Classical (37%)

Bullet
Blitz
Rapid
Classical

  • Bullet: 48.7% win rate (174 games)
  • Blitz: 46.4% win rate (723 games)
  • Rapid: 50.5% win rate (227 games)
  • Classical: 36.8% win rate (8 games)

White% by Rating × Time Control

Click any cell to filter. Green = above 50%, Red = below 50%.

RatingUBBulleBlitzRapidClass
0-999——
1000-1199——
1200-1399——
1400-1599—
1600-1799—
1800-1999—
2000-2199—
2200-2499——
2500+——

Expected score matrix by rating bracket and time control

  • 0-999 rating, Bullet: 21.5% expected score (2 games)
  • 0-999 rating, Blitz: 50.0% expected score (2 games)
  • 0-999 rating, Rapid: 70.0% expected score (1 games)
  • 1000-1199 rating, Bullet: 86.4% expected score (4 games)
  • 1000-1199 rating, Blitz: 62.0% expected score (11 games)
  • 1000-1199 rating, Rapid: 78.6% expected score (2 games)
  • 1200-1399 rating, Bullet: 46.0% expected score (11 games)
  • 1200-1399 rating, Blitz: 64.3% expected score (23 games)
  • 1200-1399 rating, Rapid: 50.0% expected score (24 games)
  • 1400-1599 rating, Bullet: 37.1% expected score (14 games)
  • 1400-1599 rating, Blitz: 50.0% expected score (55 games)
  • 1400-1599 rating, Rapid: 51.4% expected score (35 games)
  • 1400-1599 rating, Classical: 21.5% expected score (2 games)
  • 1600-1799 rating, Bullet: 38.6% expected score (16 games)
  • 1600-1799 rating, Blitz: 41.6% expected score (111 games)
  • 1600-1799 rating, Rapid: 63.8% expected score (53 games)
  • 1600-1799 rating, Classical: 61.2% expected score (3 games)
  • 1800-1999 rating, Bullet: 70.4% expected score (23 games)
  • 1800-1999 rating, Blitz: 45.6% expected score (155 games)
  • 1800-1999 rating, Rapid: 45.7% expected score (68 games)
  • 1800-1999 rating, Classical: 50.0% expected score (2 games)
  • 2000-2199 rating, Bullet: 59.1% expected score (26 games)
  • 2000-2199 rating, Blitz: 46.0% expected score (187 games)
  • 2000-2199 rating, Rapid: 53.4% expected score (28 games)
  • 2000-2199 rating, Classical: 30.0% expected score (1 games)
  • 2200-2499 rating, Bullet: 43.5% expected score (68 games)
  • 2200-2499 rating, Blitz: 55.0% expected score (149 games)
  • 2200-2499 rating, Rapid: 43.6% expected score (14 games)
  • 2500+ rating, Bullet: 50.0% expected score (10 games)
  • 2500+ rating, Blitz: 43.7% expected score (30 games)
  • 2500+ rating, Rapid: 50.0% expected score (2 games)

Related Openings

Parent
Blackmar-Diemer Gambit Accepted
50.9%
Variations (5)
Blackmar-Diemer Gambit Accepted: Bogoljubow Defense
46.9%
Blackmar-Diemer Gambit Accepted: Bogoljubow Defense, Kloss Attack
47.1%
Blackmar-Diemer Gambit Accepted: Bogoljubow Defense, Mad Dog Attack
50.1%
Blackmar-Diemer Gambit Accepted: Bogoljubow Defense, Nimzowitsch Attack
47.9%
Blackmar-Diemer Gambit Accepted: Bogoljubow Defense, Studier Attack
52.0%
Analyze Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation PositionsGet move-by-move win rates with the TrueElo analyzer

Frequently Asked Questions

What is the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation win rate?

The Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation has a 47.6% (90% CI: 45.2%-50.0%) win rate for white, based on 1.1K rated games from Lichess.

At what rating does the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation perform best?

The Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation performs best at 2200-2499 Elo with a 48.4% win rate for white (231 games). Win rate tends to decline at higher ratings as opponents know the theory better.

Is the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation better in blitz or rapid?

Rapid (50.5%) outperforms Bullet (48.7%) by 1.8%. Choose your time control wisely.

How sharp is the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation?

The Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation has a sharpness score of 96.7 (very decisive), meaning 96.7% of games end decisively. Average game length is 29 moves.

What is the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation win rate at 1400-1599 Elo?

At 1400-1599 Elo, the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation has a 46.0% (90% CI: 38.2%-54.0%) win rate for white, based on 106 Lichess games. Average game length is 26 moves with a 3.3% draw rate.

What is the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation win rate at 1600-1799 Elo?

At 1600-1799 Elo, the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation has a 48.0% (90% CI: 41.9%-54.0%) win rate for white, based on 183 Lichess games. Average game length is 27 moves with a 0.3% draw rate.

What is the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation win rate at 1800-1999 Elo?

At 1800-1999 Elo, the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation has a 45.9% (90% CI: 40.7%-51.1%) win rate for white, based on 248 Lichess games. Average game length is 28 moves with a 4.2% draw rate.

What is the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation win rate at 2000-2199 Elo?

At 2000-2199 Elo, the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation has a 46.6% (90% CI: 41.4%-51.9%) win rate for white, based on 242 Lichess games. Average game length is 31 moves with a 3.1% draw rate.

What is the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation win rate at 2200-2499 Elo?

At 2200-2499 Elo, the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation has a 48.4% (90% CI: 43.0%-53.8%) win rate for white, based on 231 Lichess games. Average game length is 32 moves with a 4.9% draw rate.

What is the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation win rate in Bullet?

In Bullet games, the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation has a 48.7% (90% CI: 42.5%-54.9%) win rate for white (174 Lichess games). Draw rate is 2.0%.

What is the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation win rate in Blitz?

In Blitz games, the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation has a 46.4% (90% CI: 43.4%-49.5%) win rate for white (723 Lichess games). Draw rate is 3.4%.

What is the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation win rate in Rapid?

In Rapid games, the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation has a 50.5% (90% CI: 45.1%-56.0%) win rate for white (227 Lichess games). Draw rate is 4.6%.

Is the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation a good opening?

The Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation is slightly favors black with a 47.6% (90% CI: 45.2%-50.0%) win rate across all ratings. It performs best at 2200-2499 Elo. Your results depend on your rating, time control, and how well you know the typical plans.